US2006235A - Sealing device for collapsible tubes and the like - Google Patents

Description

June 25, 1935- s. DE FAVER! ET AL SEALING DEVICE FOR COLLAPSIBLE TUBES AND THE LIKE Filed Oct. 31, 1934 2Sheets-Sheet l June 25, 1935. s. DE FAVER] 'Er AL 2,005,235

SEALING DEVICE FOR COLLAPSIBLE TUBES AND THE LIKE Filed Oct. 51, 1934 v g Sheets-Sheet 2 Z'mnentor 5: Je iz/er'z' 9 3. 65778172 (Ittorneg Patented June 25, 1935 "UNITED STATES SEALING DEVICE FOR COLLAPSIBLE TUBES AND THE LIKE Serafino De Faveri and Ri ccardo (limatti, London, England, assignors to Monocap Limited,

\ London, England Application" October 31, 1934, Serial No. 750,876 In Great Britain September 28, 1933 i Y 7 Claims. (Cl. 221-.60

This invention relates to closures for collapsible tubes and other containers of the kind having a cap adjustable in position on the neck of the con' tainer, 'an upwardly diminishing extension or portion of the neck of the container, one or more apertures in this upwardly diminishing part adapted to beclosed by the cap and an orifice in the cap adapted to be closed by the neck of the container. v I

The first object of the invention is to provide an improved closure of this kind, which permits of easy ejection of the material with a small displacement of the cap.

A further object of the invention is to enable the cap to serve'as a receptacle or table for holding the ejected material in a convenient position for removal and use.

The invention is illustrated by way'of example in the accompanying drawings, in which:

. Figure 1 is a sectional view of one embodiment of the invention.

Figure 2 is a sectional View of anotherembodiment of the invention. g

Figure 3 shows a tube closure having incompletely perforated delivery holes in the nozzle and provided with a perforating device.

Figure 4 is a plan View of the said perforating device.

Figure 5 shows a tube nozzle in which a sealing coating is provided over the delivery holes of the nozzle.- e i M i In the embodiment of theinvention'illustrated in'Figure 1, of the drawings, the delivery end of the tube I is formed with a hollow nozzle or neck 73 in-the form of a truncated cone having a gradually increasing-taper '3 from its free smaller endto its base. the nozzle being closed at its outer end and having on its incurved conical surface, one or more apertures or orifices 4, through which the substance contained in the tube can'beej'ected when the latter is squeezed, these apertures or orifices being suitably situated between the closed end and the root of the nozzle or neck.

Upon this conical member'is fitted a'removable cap or covert, having a central perforation B of such size'a'nd shape that its inner wall 1 is always spaced out of contact with the surface of the nozzle, the perforation 6 terminating at its outer end in a narrow conical ring 8 adapted to engage closely and smoothly over the smaller end of the nozzle without biting into the material of the latter. p

The cap 5 has at the wider'end of its perfora tion an internal screw thread adapted to engage with a corresponding external thread at the root of the nozzle; These (ac-operating screw threads will permit the cap to be screwed down so "that the conical ring 8 in the cap 5 engages closely over the end of the nozzle, and seals the delivery aperture or apertures formed in the nozzle, or 5' screwed outwards a suitable distance so that its internal surface no longer seals the delivery aperture' or apertures and the contents of the tube can be squeezed out. 1

As will be seen fromthe drawing, the incurved conical nozzle is of short height in relation to its base diameter and is made withavery sharp taper. This permits the closure to be sealed or opened with a minimum displacement of the cap on the nozzle.

"Further, the tapered wall of the nozzle is' made i in the form of are-entrant curve giving an in: creasing'taper from tip to root and the edge 8 of the ring at the outlet and of the cap-is made conical and rounded so as toengage smoothly upon the free end of the cone when thecap is in the closed position. This construction of thenozzle and of the'cap orifice avoids any wedging'action which would be produced it the cone were made straight. By making the wall of the nozzle in the form of a re-entrant curve, the engagementof the ring 8 upon the nozzle is more smooth and gradual and in the event of wear a new seating position for the ring 8 is easily established without biting into the material of the ring and with 30 out exerting any bursting action on the cap which might tend to be produced if the nozzle were made in the form of a straight wide cone.

The curved form 'of-thewallof the nozzle also assists the outward flow of the material when the tube is squeezed and tends todirectthis material towards the direction of outlet. This action is further facilitated and increased by the shape of the inner wall I of the cap which is spaced apart from'the' wall 3 of the nozzle so as to leave a chamber in which the material can flow easily towards the outlet of the container.

If the wall 1' of the cap were made to engage closely over the wall 3 of the nozzle, a considerable friction would exist at all times which will impede the free passage of the material. Pref erably, as shown in the drawings, the inner wall 1. of the cap is made in the form of a curve, of approximately opposite shape to that of the Wall 3 as shown in Figure 1.

With such a curvature of the wall 1, the material is still further directed towards the direction of the outlet when the tube is squeezed.

In the embodiment of the invention illustrated in Figure 2, the nozzle 9 and its outer surface of the nozzle and the internal surface of the cap.

cup-shaped table H.

. the outlet orifices formed in the nozzle.

, I3 to form a chamber l2 for receiving the material as it is ejected from the tube.

In this embodiment, however, the cap [3 is expanded at its head, which is dished to form a When the cap is screwed away from the body of the container, the cupped table l4 provides a receptacle into which the material ejected from the tube can be received and removed as required. For example in the case of toilet cream or shaving cream, a quantity of cream may be squeezed out of the tube as required and may be removed from the cup after the cap has been screwed down to seal the tube again.

This provides a very clean and convenient way of using the material squeezed out of thetube as will readily be appreciated.

In order to provide a perfect seal when the material contained in the tubes has to be stored, the delivery holes in the nozzle may be arranged to be normally closed. In the example shown in Figure 3,the delivery holes l5 are incompletely perforated and a ring l6 provided with a piercing point I1 (see Figure 4) is mounted on the tube neck below the cap. .Or as shown in Figure 5, a filmor coatinglB of gelatine or the like material may be applied over the nozzle so as to Ts gal 1s film will be removed by the purchaser in order to liberate the orifices in the nozzle and permit the contents to be squeezed out of the tube.

In both the embodiments described above, on

account of the fact that the nozzle taper is greater at the base than at the tip, the material forced through the holes in the nozzle will tend to be directed upwards towards the discharging orifice of'the cap, and this movement will be assisted by the free space left between the outer surface Moreoventhe narrow sealing ring at the mouth of the cap, provides a quick opening and sealing action when the cap is turned one way or the other and the conical shape of this ring in conjunction with the increasing taper of the nozzle,

provides at all times; a perfect seal when the cap is screwed down.

,A'freefiow of material is readily obtained when the capis opened and the tube is squeezed, and no resistance is experienced as would be the case if-the nozzle vweremadewith a straight cone and the cap with a co-operating internal straight cone fitting closely over the nozzle in the closed position.

, 'f 1 Having now described our invention, what we claim as new and desire to secure by Letters Patent is l. Aclosure for collapsible tubes and other containers of the kind set forth, comprising an apertured deliverynozzle in theform of a truncated cone of sharp taper and of small depth in propor-, tion to its base diameter, having an incurved surface whereby the nozzle is given an increasing taper from tip to root, and a cap adjustable on this nozzle and terminating at its outer end in a narrow ring having a rounded conical ,edge

adapted to engage closely and smoothly over the smaller end of the said nozzle.

2. A closure for collapsible tubes and other con- 7 tainers as claimed in claim 1, wherein the inner surface-of thesaid cap is arranged in spaced relationship with the incurved conical surface of the nozzle whereby an annular chamber is formed between the saidnozzle and the said cap.

3. A closure for collapsibletubes comprising a screw-threaded neck portion on the tube terminating in atapered delivery nozzle (2) in the form'of a truncated cone of sharp taper and of small depth in proportion to its base diameter, and having an incurved surface (3), whereby the nozzle is given an increasing taper from root to tip, and upwardly inclined delivery ducts formed substantially in the centre of the incurved wall of the nozzle, a centrally apertured cap adapted to screw on the said neck and terminating at its outer end in a narrow ring (8) having a rounded conical edge adapted to engage closely and smoothly over the smaller endof the said. nozzle-the inner surface (1) of the cap between the termination of the thread on the said cap and the said narrow ringhaving a smooth surfaceof opposite curvature to that of thenozzlawhichsur face is so formed as to guide the extruded contents of the tube towards the outlet end 'of the cap.

4. A closure for collapsible tubes and other cantainers of the kind set'forth as claimed in claim 3, wherein the delivery ducts in the said nozzle are normally sealed and have to be freed before any material can be removedfrom the tube or, other container.

5. Aclosure for collapsible tubes and othercontainers of the kind set forth as claimed in claim 3, wherein the said delivery ducts in the nozzle are sealed during manufacture by coating the said nozzle with a layer of gelatineor like material, which said layer has to be detached before any material can be extruded from the tube or other container. 1 I

6. A closure for collapsible tubes and other containers' of the kind set forth, comprising an apertured delivery nozzle in the form of a truncated cone of sharp taper and of small depth in proportion to its base diameter, having an incurved surface, whereby the nozzle is given an increasing taper from root to tip, and a cap adjustable on this nozzle and having itsinner surface arranged in spaced relationship with the incurvedv conical surface of the nozzle, whereby an annular chamber is formed between the said nozzle and the said cap, the said cap terminating at its outer end in a narrow ring having a rounded conical edge adapted to engage closely and smoothly over the smaller end of the said nozzle and the said containers of the kind set forth, according to claim 6, wherein the outer endof the cap is dished to form a cup-shaped receptacle.

, SERAFINO DE FAVERI. RICCARDO CIMA'II'I.

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